1 /* 2 * AHCI SATA platform driver 3 * 4 * Copyright 2004-2005 Red Hat, Inc. 5 * Jeff Garzik <jgarzik@pobox.com> 6 * Copyright 2010 MontaVista Software, LLC. 7 * Anton Vorontsov <avorontsov@ru.mvista.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2, or (at your option) 12 * any later version. 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/pm.h> 18 #include <linux/device.h> 19 #include <linux/of_device.h> 20 #include <linux/platform_device.h> 21 #include <linux/libata.h> 22 #include <linux/ahci_platform.h> 23 #include "ahci.h" 24 25 static const struct ata_port_info ahci_port_info = { 26 .flags = AHCI_FLAG_COMMON, 27 .pio_mask = ATA_PIO4, 28 .udma_mask = ATA_UDMA6, 29 .port_ops = &ahci_platform_ops, 30 }; 31 32 static int ahci_probe(struct platform_device *pdev) 33 { 34 struct device *dev = &pdev->dev; 35 struct ahci_platform_data *pdata = dev_get_platdata(dev); 36 struct ahci_host_priv *hpriv; 37 unsigned long hflags = 0; 38 int rc; 39 40 hpriv = ahci_platform_get_resources(pdev); 41 if (IS_ERR(hpriv)) 42 return PTR_ERR(hpriv); 43 44 rc = ahci_platform_enable_resources(hpriv); 45 if (rc) 46 return rc; 47 48 /* 49 * Some platforms might need to prepare for mmio region access, 50 * which could be done in the following init call. So, the mmio 51 * region shouldn't be accessed before init (if provided) has 52 * returned successfully. 53 */ 54 if (pdata && pdata->init) { 55 rc = pdata->init(dev, hpriv->mmio); 56 if (rc) 57 goto disable_resources; 58 } 59 60 if (of_device_is_compatible(dev->of_node, "hisilicon,hisi-ahci")) 61 hflags |= AHCI_HFLAG_NO_FBS | AHCI_HFLAG_NO_NCQ; 62 63 rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 64 hflags, 0, 0); 65 if (rc) 66 goto pdata_exit; 67 68 return 0; 69 pdata_exit: 70 if (pdata && pdata->exit) 71 pdata->exit(dev); 72 disable_resources: 73 ahci_platform_disable_resources(hpriv); 74 return rc; 75 } 76 77 static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend, 78 ahci_platform_resume); 79 80 static const struct of_device_id ahci_of_match[] = { 81 { .compatible = "snps,spear-ahci", }, 82 { .compatible = "snps,exynos5440-ahci", }, 83 { .compatible = "ibm,476gtr-ahci", }, 84 { .compatible = "snps,dwc-ahci", }, 85 { .compatible = "hisilicon,hisi-ahci", }, 86 {}, 87 }; 88 MODULE_DEVICE_TABLE(of, ahci_of_match); 89 90 static struct platform_driver ahci_driver = { 91 .probe = ahci_probe, 92 .remove = ata_platform_remove_one, 93 .driver = { 94 .name = "ahci", 95 .owner = THIS_MODULE, 96 .of_match_table = ahci_of_match, 97 .pm = &ahci_pm_ops, 98 }, 99 }; 100 module_platform_driver(ahci_driver); 101 102 MODULE_DESCRIPTION("AHCI SATA platform driver"); 103 MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>"); 104 MODULE_LICENSE("GPL"); 105 MODULE_ALIAS("platform:ahci"); 106